Fix cached route problem.
Fix cached route problem.

Submitted by:	Keiichi SHIMA <keiichi@iij.ad.jp> (KAME)
Reviewed by:	JINMEI Tatuya <jinmei@isl.rdc.toshiba.co.jp> (KAME)
MFC after:	1 week

jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase